Steam trap



May l2, 1931. D R, YARNALL 1,805,064

STEAM TRAP Filed Aug. 6l 1925 ZM i E provide for lifting of Patented May12, 1931 NM'JL-W'ARING COMPANY, 0F PHILADELPHIA,-PENNSYLVANIA ACORPORATION QF DAVD PENNSYLVANIA v STEAM-TRAB i d application mea Augustc, ieee. serilu No. rar-,sea My invention relates to steam traps andparticularly to methods of operating the valves of such a trap.

The main purpose of my invention is to ball rvalves from their seats bythe hammer as distinguished from wedging the balls from their seats inprevious yforms.

A further purpose is to provide for displacement of ball valves upontheir seats by the operating` rod of a hammer blow bucket type steamtrap and to operate the valves by levers between the operating rods andthe valves.

A further purpose is to lift the balls of a ball valve bucket type steamtrap by lifting wedges balanced with respect to the valves.

A further purpose is to increase the capacity of the float bucketwithout .increasing its height nor its overflow diameter.

Further purposes will appear in the specilication and in the claims.

I prefer to illustrate my invention lby but one form, selecting a formwhich is simple,

practical andhighly desirable and which at the same time wellillustrates the principles of my invention.

Figure 1 is a central'vertical section of a structure embodying` myinvention.

Figure 2 is a fragmentary ysection taken 1 and looking in upon lineQ-Zof Figure the direction of the arrows.

My invention is intended to bean improvement upon a. type of valves atpresent in use and which is shown in Charles H. rlhompson applicationfor patent Serial No. 711,344,

filed May v6, 1921i, and particularly to avoid the downward component ofthe wedge pressure present in the valve operation of this rlhompson formof intermittent ldischarge trap. l

The main or lower compartment 6,l having inlet 7 and clean-out plug 8contains within it the operating bucket 9 which is enlarged in diameterat its lower end to give additional Rotation without enlarging itsoveriow diameter. `VThe lcompartment is closed .at the top by aflangememberll boltedfast to the upper 'flange-12 of the lower compartment.

blow of a bucket trap y locked there by nut 29; 'lever 26 surrounds'therod 30 and is engaged Aby a projection carried by the rod shown in Thisfrees thelever Jfrom direct projections and the end of the lever. leverend is subsequently struck by the lower` The open tube 13, preferablyintegral with theI flange member 10, extendsY downwardly into and tonear the bottom of the bucket 9,

rrsn STATES l?arr;Nr`*orticafg?A ROBERT YARNALL, orrHILADEL-PHMPENNSYLVANIA, ASISIGNORTO''Y- Y,

and has its lower end 14 serrated to avoidpo'sl sible closure againstthe bottom ofv the bucket. f

The upper surface of the flangemember 10 is used to'y forma valve platelwhich lis Ybored at 16 in registration with the upper and open end ofthe tube'13.y The'valve seats c 17 are set at some distance and areequally spaced from it. ,Each 'valve from this bore 16y seat lies withinthe rim 18 of a threaded bush 19.v Y, .A y p ",.The ,lever 26 pivotedvat 27 in a' post 28 threaded into the valve plate and forsafety Theinner endV of the the form of locknuts 31 upon a thread-32.`

engagement with the rod and 'allows the rod to deliver a hammer blow tothe lever andV hencethrough the wedge tothe ball valves, lifting and atthe same time spreading these valves.

the lock nutsl or other v This engagement between side ofthe lower lock"nut transmitting the' :blow simultaneously and lequally to all of ytheballs. i

The bucket' is protected from direct lateral flow of the stream vfromthe inlet 7 by al suitable balie33 forming the inside wall of adownwardly directed inlet passage 34.

lVith this arrangement, when the bucket''f starts to lill andsink'there' is no immediate Y The operation is improved by providing avent 36 throughV the baffle 33 from the top of the inlet passage i iandan outlet vent 37 from the main compart: ment preferably into thetube 13 above the bucket and below' the cover 10.

yThe screw stem.38 isprovided lwithlhand upper end of the rod 30Ato-open the valves and to hold them open as long .asdesiredy I jl intotheV main compartment wheel 39 Aand packing gglandeo. rWhen -screweddown it' engages and Vdepr'ess'es the s In operation drainage from the'steam lines enters the trap at the inlet pipev 7 rising until itoverflows into the floating bucket 9. The! bucket begins to sink as itfills and as it does so fills with a rush causing it to sink with arush. As the bucket starts to sink the rod 30 moves downwardly slowlywith it, followed 5 b a very rapid movement causing a hammer blbw by thelock nuts upon t-his rod. This blowacts equally upon each of the balls,and rolls the balls laterally from their seats openinthe trap todischarge.

team pressure within the trap now forces..

rapid discharge into and through the open notched end 14 of the centralypipe 18 into the top shell and out through the uncovered ports 17 intothe discharge passage 19 and thence through pipe 21 to waste, emptyingthe bucket.

As the bucket empties it rises, floating upwardly lifting the rod andreleasing the end of the lever 26 surrounding the rod. The

20 vouter end of the lever being heavier than the inner end, the levertilts in a counter-clockwise position permitting the ball valves to rollback to their positions over the valve openings. This is assisted by theweight of the balls which tend to depress the outer end of the lever.When the ball valvesV close the openings they stop the dischargecompleting the cycle.` *Y The vent 36 automatically prevents locking ofair or other vapor in the inlet passage 34 and the vent 37 automaticallyrelieves air or vapor locked in the upper part vof the lower compartmentresulting in much better and smoother operation.

My construction retains the advantagesy of Y wedge action present in thestructure of the Thompson application above referred to while avoidingthe downward pressure upon the balls present in that construction and 40combining wedge and lifting actions to great advantage.l Y

In View of my invention and disclosure, f variations and modiiicationsto meet individual need or particular whim will doubtless become evidentto others skilled in the art, I of course intend to claim herein allsuch in so far as they fall within the reasonable spirit and scope of myinvention.

Having thus described my invention', what I claim as new and desire'tosecure by Letters Patent is z- Y y In a steam trap for intermittentdischarge,

a trap bucket, a compartment therefor, a pluu rality of spacedindependent Vdischarge valves each comprising a seat and a ball adaptedto roll over andaway fromthe valve opening, a projection movable withthetrap bucket, ,a lever having one end adapted to engage all ,of the ballsto roll themfrom their seats,

f heavier at the end which engages the balls so as normally to eXert nopressure upon them, and atits opposite end coming within the path ofmovement of the projection and a pivotA for the lever between its ends.

DAVID ROBERT YARNALL

